Remember that skeleton key sets the shroud location to 1, after modifiers. This means that you can't use other effects that reduce the test further to further reduce to 0.

I think this card is as such still too expensive (both in actions and experience) to use for most classes.

Drawing Thin is a type of card I often dislike and worry about. I can see the designers really tried to balance the cards as much as possible and on the face of it spending a card and an action for cards in the future seems somewhat balanced. They certainly got the balance better than other games in the past!

However, the problem cards like this have is they only get included in decks where the effect is going to be abused, otherwise you won't bother with the card. If you make the card weak enough to not be abused it is far too weak to be considered in another deck so either you see the card in a deck where it is a major engine for limitless resources, or you don't see it at all.

Only a subset of encounter cards remain in play. Many have a revelation effect and are immediately put in the discard pile. For this reason, Darrell can get a lot more use out of his camera in higher player count games where more encounter cards are seen each turn.

The fact that he can place the evidence on enemies and treachery cards that investigators drew at any location (That hopefully have clues on them!) makes multiplayer the place that this card shines.

Finally, don't forget that many weaknesses are treachery cards so you can benefit off of your allies' misfortune. ;-)

Funnily enough, if this guy is in the Theatre and you are in the Balcony, you won’t be able to hear it sing, as the Balcony is not a “connecting location”. (Compare the wording to that of the Abbess from Carnivale of Horrors, for instance.)

arkhamdb.com

I built a Dexter Drake that is a flex fighter, and this card seems invaluable. If you're taking Arcane Research (or two copies of it), In the Thick of It, and maybe even Charon's Obol, Hallowed Chalice looks amazing for survivability (especially if you can tutor 'Charm' with Molly Maxwell). Surprisingly, aside from Sword Cane and upgrading to Cyclopean Hammer late game, Dex's hand slot can be relatively uncontested if you're relying on Arcane slots to do your damage dealing.

Dex is actually the surprise winner of the Scarlet Keys mystic cards suite. Power Word, String of Curses, Uncage Soul (3) all seem pretty powerful with him, and even the Rogue cards such as Kicking the Hornet's Nest, Underworld Market, and Dirty Fighting can find a home with him.